I am comparing two biomes tundra and forest. Both of them are slighty different from each other but at the same time they all have similarites. The forest biome started about 420 years ago, The first forests were dominated by giant horsetails, club mosses, and ferns that stood 40 feet tall. Today forest cover abour 1/3 of earths land area. Thundra in the other side is an extremely cold envoirment, Tundras are in extremely cold climate, low boitic diversity, simple vegetation structure, limitation of drainage, short season of growth and reproduction, enegry and nutrients in the form of dead organice material , and also large popultation oscillations.
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